Nasa Wavelength

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Instructional Strategies

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Secchi Disk Interactive

Learn how to build a Secchi disk and use it to make water transparency measurements following the GLOBE protocol for water transparency measurement with a Secchi disk. This resource is part of the GLOBE Program Hydrosphere Protocol eTraining.

What is Wind Chill?

This resource introduces the concept of wind chill, the formula used to measure it and relates it to the causes of hypothermia. A simple experiment using a pie pan, sand, fan and a thermometer demonstrates this concept.

Sand or Rock: Finding Out from 1000 km

Learners will measure temperature of two different surfaces; sand and stone; on a sunny day, make a series of temperature measurements, and plot the results. Extensions include experimenting with different materials, using temperature sensors and noncontact infrared thermometers.

Looking Back in Time

This lesson plan will provide a concrete way for students to understand the concept of distance in space equals distance in time. This is done using information gathered from a timeline activity in Lesson 1: Earth, the Universe, and Culture.

What Heats the Earth's Interior?

In this textbook chapter, students learn about the source of the Earth's internal heat engine, convection in the Earth's core, the role of superplumes in Earth's history, and the influence of tectonic activity on the Earth's climate.